Implementing padding in a white-box implementation

Implementing padding in a white box implementation is provided; a secret key encrypted operational method can map an input message with a coding portion and a padding portion to an output message; the method comprises the following steps: receiving a padding value k; receiving the input message, wherein the padding portion has the size indicated by the padding value k; calculating the first portion of the encrypted operation so as to generate the first portion output; calculating a compensation factor corresponding to the padding portion of the input message; compensating the first portion output according to the compensation factor. 在白盒实现方案中实现填充。种加密钥的加密运算方法，用于将具有编码部分和填充部分的输入消息映射到输出消息，该方法包括：接收填充值k；接收输入消息，其中，填充部分具有由填充值k指示的大小；计算加密运算的第部分，以产生第部分输出；计算与输入消息的填充部分相对应的补偿因数；以及基于补偿因数，补偿第部分输出。